Made of cool, breathable foam material, this plantar fasciitis night splint is lightweight with less bulk than other night splint devices for superior comfort. The inner shell provides lateral side support with an opening at the ankle to prevent irritation on the sensitive ankle bone. An adjustable hinge adjusts the amount of dorsiflexion from 0 to 10º, and a built-in toe wedge gives an additional 5º plane for even greater stretch across the Plantar Fascia. Easy and quick to apply and comfortable enough to sleep in. The non-slip bottom helps prevent accidental slipping on flooring — intended for sleeping and NOT for walking. Ideal for Plantar Fasciitis and Achilles Tendonitis.